<template>
  <div class="app-container">

    <h2 style="text-align: center;">发布新课程</h2>

    <el-steps :active="3" process-status="wait" align-center style="margin-bottom: 40px;">
      <el-step title="填写课程基本信息"/>
      <el-step title="创建课程大纲"/>
      <el-step title="发布课程"/>
    </el-steps>

    <div class="ccInfo">
      <img :src="publishCourse.cover">
      <div class="main">
        <h2>{{ publishCourse.title }}</h2>
        <p class="gray"><span>共{{ publishCourse.lessonNum }}课时</span></p>
        <p><span>所属分类：{{ publishCourse.subjectLevelOne }} — {{ publishCourse.subjectLevelTwo }}</span></p>
        <p>课程讲师：{{ publishCourse.teacherName }}</p>
        <h3 class="red">￥{{ publishCourse.price }}</h3>
      </div>
    </div>

    <div>
      <el-button @click="previous">返回修改</el-button>
      <el-button :disabled="saveBtnDisabled" type="primary" @click="publish">发布课程</el-button>
    </div>
  </div>
</template>

<script>

  import course from '@/api/edu/course'

  export default {
    data() {
      return {
        courseId: '',
        saveBtnDisabled: false, // 保存按钮是否禁用
        publishCourse: {}
      }
    },

    created() {
      this.init()
    },

    methods: {
      previous() {
        console.log('previous')
        this.$router.push({ path: `/course/chapter/${courseId}` })
      },
      /**
       * 最终发布
       */
      publish() {
        this.$confirm('是否要发布？', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(() => {
          course.publishCourse(this.courseId).then(res => {
            if (res.success) {
              this.$message.success("课程发布成功");
              this.$router.push({ path: '/course/list' })
            } else {
              this.$message.error(res.message);
            }
          })
        })
      },
      /**
       * 页面初始化
       */
      init() {
        // 1.获取路由中的courseId
        if (this.$route.params && this.$route.params.id) {
          this.courseId = this.$route.params.id
        }
        // 2.发送请求去拿对应的信息
        if (this.courseId) {
          course.getPublishCourseInfo(this.courseId).then(res => {
            console.log(res)
            this.publishCourse = res.data.publishCourse
          })
        }
      }
    }
  }
</script>

<style scoped>
  .ccInfo {
    background: #f5f5f5;
    padding: 20px;
    overflow: hidden;
    border: 1px dashed #DDD;
    margin-bottom: 40px;
    position: relative;
  }
  .ccInfo img {
    background: #d6d6d6;
    width: 500px;
    height: 278px;
    display: block;
    float: left;
    border: none;
  }
  .ccInfo .main {
    margin-left: 520px;
  }

  .ccInfo .main h2 {
    font-size: 28px;
    margin-bottom: 30px;
    line-height: 1;
    font-weight: normal;
  }
  .ccInfo .main p {
    margin-bottom: 10px;
    word-wrap: break-word;
    line-height: 24px;
    max-height: 48px;
    overflow: hidden;
  }

  .ccInfo .main p {
    margin-bottom: 10px;
    word-wrap: break-word;
    line-height: 24px;
    max-height: 48px;
    overflow: hidden;
  }
  .ccInfo .main h3 {
    left: 540px;
    bottom: 20px;
    line-height: 1;
    font-size: 28px;
    color: #d32f24;
    font-weight: normal;
    position: absolute;
  }
</style>
